English verb conjugation
COULD DRINK

Irregular verb: drink - drank - drunk

Affirmation

Simple form	V-ing form
I could drink you could drink he could drink we could drink you could drink they could drink	I could be drinking you could be drinking he could be drinking we could be drinking you could be drinking they could be drinking
Perfect	V-ing perfect
I could have drunk you could have drunk he could have drunk we could have drunk you could have drunk they could have drunk	I could have been drinking you could have been drinking he could have been drinking we could have been drinking you could have been drinking they could have been drinking

Negation

Simple form	V-ing form
I couldn't drink you couldn't drink he couldn't drink we couldn't drink you couldn't drink they couldn't drink	I couldn't be drinking you couldn't be drinking he couldn't be drinking we couldn't be drinking you couldn't be drinking they couldn't be drinking
Perfect	V-ing perfect
I couldn't have drunk you couldn't have drunk he couldn't have drunk we couldn't have drunk you couldn't have drunk they couldn't have drunk	I couldn't have been drinking you couldn't have been drinking he couldn't have been drinking we couldn't have been drinking you couldn't have been drinking they couldn't have been drinking

Interrogative form

Simple form	V-ing form
could I drink? could you drink? could he drink? could we drink? could you drink? could they drink?	could I be drinking? could you be drinking? could he be drinking? could we be drinking? could you be drinking? could they be drinking?
Perfect	V-ing perfect
could I have drunk? could you have drunk? could he have drunk? could we have drunk? could you have drunk? could they have drunk?	could I have been drinking? could you have been drinking? could he have been drinking? could we have been drinking? could you have been drinking? could they have been drinking?

Interro-negative form

Simple form	V-ing form
couldn't I drink? couldn't you drink? couldn't he drink? couldn't we drink? couldn't you drink? couldn't they drink?	couldn't I be drinking? couldn't you be drinking? couldn't he be drinking? couldn't we be drinking? couldn't you be drinking? couldn't they be drinking?
Perfect	V-ing perfect
couldn't I have drunk? couldn't you have drunk? couldn't he have drunk? couldn't we have drunk? couldn't you have drunk? couldn't they have drunk?	couldn't I have been drinking? couldn't you have been drinking? couldn't he have been drinking? couldn't we have been drinking? couldn't you have been drinking? couldn't they have been drinking?